Harmonix and MTV Games today announced the PAX Pack, a pack containing three tracks from Jonathan Coulton, MC Frontalot and Darkest of the Hillside Thickets, set to be available tomorrow via XBLA and on Thursday via PSN for either 240 Microsoft Points or $2.99. Games' proceeds from the sale of this PAX Pack between launch and Holiday 2008 will be donated to the Penny Arcade run Child's Play Charity, in order to help out children's hospitals around the world.